Ruby Roman is the name of a variety of grapes, but each bunch must meet the strictest standards in order to qualify for the designation. Each grape within the cluster must have a weight of 20 grams and a sugar concentration of 18 per cent. And these figures must be precise. Before entering a Japanese supermarket or upscale fruit market, these grapes undergo rigorous processing. They must meet size and colour specifications, as well as have no blemishes or irregular shapes. Superior Ruby Roman grapes meet the aforementioned criteria and are ready for sale. Special Superior indicates that these grapes have exceeded the aforementioned requirements. They will have the best colour, shape, and size, as well as a sugar content greater than 18 per cent. To qualify for the Premium category of Ruby Romans, each grape must weigh 30 grams, and the bunch must weigh over 700 grams. This implies that the cluster of grapes must be perfect. And when these grapes meet these standards of perfection, for instance, they can be sold at auction for approximately $12,000.